You need to wait until Windows loads the boot files.Click on “Yes” to initiate network connectivity in the background.

Click on “Yes” to Remap the drive letters.Click Next to continue. Select the Operating system from below screen and click on “Yes”.

Below image shows for Windows Server 2003 / Win XP

You need to click on Microsoft Diagnostics and Recovery Toolset.

You will get below screen which contains all the troubleshooting tools, Based on your problem you need to select the tools,

Most of the Reboot or OS problems are loading issues, or there might be a problem with Services / Drives, Click on Computer management to get services window. You can select the Problematic service and disable that service / Driver.

Close all the dialog boxes until you can get to the “Shut Down” button. Reboot the server.

Other DART tools information

DISK COMMANDER:
The Disk Commander can be used to salvage or repair partitions, or volumes and even repair MBR

TCP/IP CONFIG:
The TCP/IP Config utility helps you to display and set a TCP/IP configuration. To enter IP address configurations.

HOTFIX UNINSTALL:
This removes hotfixes or service packs from a system that fails to boot.

SFC SCAN:
This helps you check system files, dlls and repair any that are corrupt or missing.

STANDALONE SYSTEM SWEEPER:
The Standalone System Sweeper utility helps detect malware or other unwanted software, and alerts you to potential risks

REMOTE CONNECTION:
Remote connection helps us to get in to any remote desktop or set up any remote connections.

I think you should add
-how to aquire Dart (as far as I can see, only volume license customers get it, right?)
-That additional steps are needed to use it on encrypted hard drives (manage-bde on the command line can unlock the drive if bitlocked, but what do we do for drives encrypted with something else if we don't want to decrypt it first)

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